In summers, the leaves of a potted plant droops when the soil becomes dry. Which cell organelle makes the leaves to droop? 1)Nucleus, as it stops making DNA.
2)Cell wall, as it starts to shrink.
3)Lysosome, as it is releasing the digestive enzymes.
4)Vacuole, as it loses all the water.

Rue or false siblings look simila rbecause they each have some traits of their parents.

You can tell from this karyotype that the individual is female because the karyotype has two chromosomes labeled

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2